Growing community of inventors

Reading, MA, United States of America

John T MacDonald

Average Co-Inventor Count = 1.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 3

John T MacDonaldJohn T MacDonald (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Gtat Corporation (2 from 72 patents)

2. Crystal Systems Corporation (1 from 24 patents)


3 patents:

1. 11680334 - Method of automatically measuring seed melt back of crystalline material

2. 11174567 - Method of automatically measuring seed melt back of crystalline material

3. 10494733 - Method of automatically measuring seed melt back of crystalline material

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as of
12/17/2025
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